Telegraph system



Aug. 1l 1925.

R. A. HElSlNG TELEGRAPH SYSTEM Filed May 29. 1922 2 Sheets-Sheet 1 R. A. HEISING TELEGRAPH SYSTEM vAug 11, 1,925.

2 Sheets-Sheet 2 Filed May 29 1922 Ali Patented ug. lll, 1925.

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RYMOND. A. HEISING, OF MILLBURN, NEW JERSEY, ASSIGNOR TO WESTERN ELEC- TRIO COMPANY, INCORPORATED, OF NEW YORK, N.

Y., A CORPORATION 0F NEW TELEGRAPH SYSTEM.

Application led May 29,1922). Serial No. 564,431.

To all lwhom it may cof/wcm.'

Be it known that I, RAYMOND A. HEISING, a'citizen of the United States, residing at Millburn, in the county of Essex, State of New Jersey, have invented certain new and useful Improvements in Telegraph Systems, of which the following is a full, clear, concise, and exact description.

This invention relates to telegraph systems and more particularly to a multiplex high speed telegraph system.

It is an object of the invention to provide a multiplex telegraph system which can .be operated at high speed and which is particularly suitable for operation .by radio.

It is another object of the invention to provide a synchronizing means operable with such a high speed system.

To accomplish these objects and in accordance with a feature of the invention,

there is provided a system in which telegraph signals are detected at high speed stored and then transferred at a lower speed to other receiving mechanisms such, for example, as a `prlnting mechanism of the type 1n common use in multiplex telegraph systems. Tn accordance with another feature of the invention a synchronizing method is provided which determines the position of the transferring mechanism with respect to the receiving mechanism at the beginning of the transfer of each series of impulses representing a character. c

These and other features of the invention will be more clearly understood by reference to the accompanying drawings in which Fig. 1 is a diagrammatic view of the storing land transferring apparatus embodying features of this invention and .arranged forl radio receiving; Fig. 2 is a schematic view of a. portion of the mechanism shown in Fig. 1; Fig. 3 is a sectional view taken along the line 4-4 ofFig. 2; and Fig. 4 is an end view of the mechanism shown in Fig. 3 with portions cut away to more clearly show the gearing mechanism.

Referring now more particularly to Fig. l, there is disclosed a radio detecting outit comprising antenna 5, transformer 6 and detector 7 together with a gridvleak 8 and variable 'condenser 9. The impulses received by this outfit are transmitted to an electromagnet 10 which is adapted to record magnetically the respective impulses upon an endless telegraphone wire 11 `dri/ven by means of the wheel 12 which is directly connected to a yconstant speed motor 13. This telegraphone wire also passes over a wheel 14 whlch 1s connected tothe mechanism in a manner more clearly shown in Figs. 2, 3V

ferring mechanism, thus permitting the transfer of signals received at a frequency of three or four hundred cycles, but the device is not limited to such velocities since it may be arranged to employ from 40 to 50 channels, in which case the storing may be at approximately 1200 to 1500 cycles while the relative motion of the magnets to the wire in any case would be such as to provide a speed of operation of 30 to 40 cycles, a frequency which is very easily adapted to operate theprinting mechanism of the present telegraph systems. The wheel 14 is arranged to carryv 18 pairs of electromagnets, each pair of magnets having its windings connected in series and the core portions disposed on opposite sides of and in close proximity to the telegraphone wire. ,The electromagnet pairs 15 to 32 inclusive, are rotated in the same direction as the telegraphone wire but at substantially ninetenths the speed of the latter so that the space taken up on the wire 11 by a set of impulses passes an electromagnet durin the time occupied by approximatelya hal revolution of the wheel 14. Each pair of receiving magnets 15 to 32 is provided with a brush member 35 adapted to lcontact during its operating period with one of the contact segments 36'to 44. These segments are connected to separate circuits for operating a printing or similar recording mechanism. For the sake of clearness, only the ci-rcuit arrangement connected to segment 36 is shown, this circuit arrangement conplate being free to rotate on the shaft 45. A pinion 50 secured at the opposite end of shaft 48 is adapted to engage the teeth of an inner gear on the wheel 51 carrylng one of each pair of the ma ets 15 to 32. This wheel is cured rigi y tothe shaft by means of a set screw 53 and a second magl net carrying wheel 54 carrying the remaining magnets is also rigidly secured to the shaft by means of a set screw 55. The plate 49 is provided at its periphery with gear teeth which-are adapted to mesh with pinion 56 connected on the shaft 57 and journaled in the wheel 51. The other end of shaft 57 is provided with a pinion 58 which meshes with the gear 59 adapted to. rotate freely about the shaft '45 and which is connected byA means of worm gearing 61 to a motor 62. Rigidly connected to theI magnet carrying wheel 54 is a brush plate 65 containing suitable brushes 35-35 which are adapted during a portion of each revolution to en- 44. The contact segments are mounted upon Y gage corresponding contact segments 36 to a stationary insulating plate 66 which is shown mounted on the bearing support 67.

The brush plate 65 also carries on its outer circumference', a brush 68 which isadapted to en age a contact segment 69 and a brush 70 a apted to engage contact segments 71 and 72. Connected to contact segment 69 is an electromagnet 73 as shown in Fig. 1, which has its core portion in close proximity to the telegraphone wire. The segment 7'1 is connected in circuit with an integrating network 74, amplifier 75 and relay 76, and

the contact segment 72 is connected in a corres onding manner to an integrating network I77, amplifier 78 and rela 79. The local contacts of relays 76 and i9 are connected, as shown, to the Windingsof a. motor 62 to permit synchronizing the system in a manner to be explained hereinafter. ln order to permit the continuous transfer of signals, a wiping magnet 81 is arranged with y its core portion in close proximity to the telegraphone wire and adapted to wipe off the message after it has been transferred to the local circuits.

Inthe operation of the device, a series of impulses are transmitted either by wire or by radio employing a transmitting mechanism which may preferably be of the general type disclosed in my copending application, Serial No. 217,139 filed February 14, 1918,

issued as Patent No. 1,426,7 33, Aug. 22, 1922.

In the arrangement shown, which is adapted for radio operation, the impulses are received by the antenna 5, and the detector 7 and then by means of the magnet 10 are stored magnetically upon the telegraphone wire 11. As the magnets 15 rotating in a counterclockwise direction approach theposition shown, their corresponding brush 35 engages contact segment 36 which is connected by means of a local circuit to a relay 39 in a standard printing mechanism such, for example, as disclosed in Patent No. 1,201,809 of Cctober 17, 1916 to A. F. Dixon. At this instant, the parts are so synchronized that a series of impulses representing a character are stored on that portion of the telegraphone wire located between magnets 15 and magnets 32 and the vmagnets 15 start to transfer the message tothe local circuit.

Since the wheel 14, upon which the magnets are mounted, revolv s at substantially nine-tenths the speed of the telegraphone wire, the message will be taken up at-a speed corresponding to the difference in speed of the magnets andthe telegraphone wire so that by the time magnets 15 reach the position shown as being occupied by magnets 24, the portion of the telegraphone wire which at the beginning of the message was positioned betweenmagnets 15 and 32 now is located in the position shown between `magnets -24 and magnets 25 and the brush printing circuit corresponding to that shown f for contact segment 36. As the wheel 14 is rotated the segments for the various channels are connected to the corresponding magnets and as the telegraphone wire passes the wiping magnet 81 the message is wiped off and the wire placed in condition ,to receive a message as it againlpasses under magnet 10.

In order to properly synchronize the mechanism so that each channel transfers one set and only one set of impulses, it is necessary to insure that a pair of magnets reach the position shown by magnets 15, the telcgraphone wire located between magnets 15 and 32 has stored upon it a complete set of impulses representing a character which is to be transferred to magnets 15 by the time they reach the position shown by magnets 24. To accomplish this, it is necessary, in the first place, that the transmitting mechanism be driven at approximately the speed of the receiving telcgraphone wire and it is possible commercially to obtain motors which will operate within 1 per cent of constant. Each set of impulses represents a character and consists of two synchronizing .impulses or phase adjusting signals and five i magnet and the brushes 68 and 70 are so ing Contact with the segment 69 or brush 70 making contact with eithercohtact -71 or v 72. If the parts are in perfect synchronism,

the brush will be at thel point shown midway between contact 71 and contact y72, when the synchronizing impulse is picked up by electromagnet 73, 1n which case no-correc'tion need be applied to the mechanism. If, however, the brush 70 is travelin at a slightly different speed than the te egraphone wire, it will be in engagement with either contact 71 or contact 72 when the syn-f chronizing impulses pass -synchronizing magnet 73. In case the brush is on Contact 71, an impulse will be transmitted from electromagnet 73 through 4brush 68 brush 70, contact 71, integrator 74, amplifier 75, and relay 7 6. The energization of the high speed relay 76 causes the closing of a local cir-v cuit including .the winding of motor 62 and battery 80, thereby causing the rotation of gear 59 and in turn,'therotati'on of plate 69 in a. direction to shift the magnet carrying wheels 51 and 54 in a forward direction. On the other hand, if the s eed of the telegraphone wire is such that! ush 70 is in engagement with contact segment 72 at this instant, a circuit is closed through .synchronizing magnet, contact 69, brushes 68 and 70, Contact 72, integrator network 77, amplier 78 and relay 79. Upon the energization of relay 79, a local circuit is closed containing the other half of the Winding-of motor 62 and the battery 8O. The motor 62 is then rotated in the opposite direction and by means of worm drive y61 and gears 59 and 49 causes the magnet carrying wheels 51 and 54 to be shifted in a backward direction. While in the arran ment illustrated means is shown for sync onizing only once in revolution of the magnet carrying wheels, it is obvious that by employing vadditional brushes and contact segments corresponding to segments 71 and 72 the device may be synchronized for each set of impulses transmitted.

What is claimed is: i

1. A telegraph system comprising means for detecting impulses at high speed, means for storing such impulses, means for transferring the impulses to the local circuits at a speed jrelatively lower than the. speedat which the impulses are stored, and means for synchronizing the speed of the transferring means with the speed of storing the impulses on said .storing means, and means in the local circuits v.for making a record of the impulses received. v,

2. A telegraphsystem comprising means for detecting impulses, means for magnetically storing said impulseson acontinuously moving telegraphoneywire, means for transferring the impulses at a 4speed to local circuits invariably slower than said detecting means, and means in the local circuits for making a vprinted record of the impulses received. i

3. A telegraph system comprising means for detecting impulses of high frequency,

means for storing the impulses detected onV a continuously moving telegraphone Wire, means for transferring signals from the telegraphone wire`tolocal circuits at a low frequency, and means for synchronizing the speed of Athe'transferring mechanism with the speed of storing of signals on the telegraphone wire.

4. `In a multiplex telegraph system, a transferring mechanism cooperating with `a continuously moving telegraphone wire to transfer signalsy stored at'high speed to local circuits at a speed relatively lower rate than the signals are stored, said mechanism comprising a plurality of transfer magnets movingV in operative relation to the telegraphone wire but at a slightly different speed.

5. In a multiplex telegraph systeml employing a plurality of channels, a transferring mechanism cooperating with a continuously yInbving telegraphone wire and local circuits for the transfer of signals stored on the telegraphone wire at high speed to the local circuits at a low speed, said lmechanism including a plurality of vstationary channel bars each of said bars being connected to a local printing circuit, a plurality of electromagnets moving in operative relation to the telegraphone wire and at a speed diering a fixed ratio therefrom, and means for synchronizing the movement of the electromagnets with the spacing of signals on the' telegraphone wire.

6..:[n a multiplex telegraph system, a receiving device operative to receive signals transmitted at a high speed, a storing device associated with jsaid receiving device forstoring the impulses of a plurality' of channels, a recording instrument for each of the channels, operative at a rrelatively lower speed than said receiving device, and means for transferring the impulsesstored in said storing device to the recording instrument of the respective channels.

7. In a multiplex telegraph system including a transferring mechanism cooperating with a continuously moving .telegraphone wire and local circuits for the transfer' of signals stored in the telegraphone wire at a high speed to the local circuits at a low speed, a synchronizing electromagnet mounted in operative relation to the telegraphone wire. a motor adapted to shift the positionot' the trans ferring mechanism with respect to the telegraphone Wire, and means for operating said motor in either direction dependent upon the synchronism of the system.

8. In a. n'iultiple-x telegraph system, means. for detecting multiplex telegraph signals at high frequency, means for stor ing said signals on a continuously moving telegraphone Wire, a groovedgear Wheel about which the telegraphone wire rotates,

a shaft upon which said wheel rotates freely, a pair otl wheels rigidly secured to said shaft each supporting a plurality of eleetroniagnets having their core portions in operative relation to the telegraplione wire, means for rotatingsaid wheels at a fixed speed relation with the grooved gear wheel, and means for altering the speed dependent upon the spacing of impulses stored on the telegraphone Wire.

9. In a multiplex telegraph system. a receiving device operative to receive signals transmitted at a high speed, a continuously moving Wire for storing the impulses of a plurality of channels, a recording instrument for each of the channels operative at a relatix'ely lower speed than said receiving device, and means for trfansferring the iinpulses stored in said moving wire to the recording instruments ot the respective channels.

In witness whereof, I hereunto subscribe my name this 22nd day of May A. D.. 1922.

RAYMOND A. HEISING. 

